Atopic dermatitis is chronic relapsing inflammatory cutaneous disease caused by combined genetic, environmental and immunological background. Treatment guideline of Korean atopic dermatitis was released by Korean Atopic Dermatitis Association work group in 2006. Due to the recent advances in atopic dermatitis research and controlled clinical studies, establishment of updated evidence-based treatment guideline for Korean atopic dermatitis is demanding. Task force team collected database of references from relevant systematic reviews and guidelines of atopic dermatitis. They raised all the relevant key statements on the management of atopic dermatitis. Evidence of each statement was graded and classified the strength of recommendation for each statement. The evidence of each statement was graded using the classification of the Oxford Centre for Evidence-Based Medicine ( level 1-level 5). The strength of recommendation was classified as follows; A, level 1; B, level 2 and 3; C, level 4; D, level 5. After three rounds of vote by fifty four council members of the Korean Atopic Dermatitis Association, expert consensus was established. Updated guideline provided up-to-date evidence based systematic combined treatment algorithm including proactive, induction and maintenance treatment. In addition, agreement scores of expert panel were presented considering Korean healthcare system and patients’ adherence.